The term regulator is used in many fields, including electronics, automation and biology.
A regulator can stop the proliferation of pests. For example, Cordyceps militaris is a fungus that is a parasite of the pine processionary caterpillar.
A speed regulator automatically sets the maximum speed of a vehicle chosen by the driver. It helps limit speeding and allows the driver to rest when driving long distances.
Some regulator fungi can stop the development of processionary caterpillars. © DR